Multiple unit fan



Dec. 14, 1926.

G. CLEMENTS MULTIPLE UNIT FAN Filed March 10 1925 3 Sheets-Sheet 1 "IN """I'llll'llllllll S [/1 z/e/zfar 62 (/W/M/ZZY M; 4 I Gm Dec. 14 1926. 1,610,360

G.v CLEMENTS MULTIPLE UNIT FAN Filed March 10 1925 3 SheetsSheot 2 N N 11 I] Dec. 14 1926.

G. CLEMENTS MULTIPLE UNIT FAIN Filed March 10 1925 3 Sheets-Sheet :5

'Patentecl Dec. 14, 1926.

' UNITED STATES GEORGE GLEMEN'IS, or cnIcAeo, ILLINOIS, ASSIGNOR T oLEMEN'T's MFG. 00., or

CHICAGO, ILLINOIS, A CO MULTIPLE RPORATION OF ILLINOIS.

UNIT JEAN.

Application filed March 10, 1925. Serial No. 14,417.

This invention relates primarily to a port- I able blower and particularly to a motor ing from the upper driven blower adapted to be provided with iber E and thence to {the fan D. E is a a plurality of fans so as to deliver air in increased velocity. One object is to provide in a portable blower means for producing a rapidly moving current of air. Another object is to provide in such a blow- -er means whereby additional fans may be added at the will of the user so as to increase or vary the velocity of the current produced.

' Other objects will appear from time to time with parts in section;

Figure 2 is a vertical cross section through the composite fan casing; I

Figure 3 is a view looking upward at the bottom of the fan casing; and- Figure 4 is a detail view of one of the air chambers".

Like parts are designated by like characters throughout. I

A is a motor casing in which a motor 0 any suitable type is positioned. -A is a plug connection to which a conduit member may be connected to provide current for driving the motor. 0 is the main fan casing to which is attached an operating handle C. Extending forwardly and projectart of the casing C is a discharge nozzle 2 to which is attached an extended blower nozzle. G On the exterior of the'casing C are three ears 'C", C which may be used when additional fan casings are attached.

Within the ,fan casing C is a rotary fan D which is mounted upon and adapted to rotate with the motor shaft D. It is held in position thereupon by means of a set screw D I E is an additional air chamber which may be fastened upon the outside of the casing C. E" is an additional fan casing which co-operates with the chamber E to permit the use of a second fan. This ,fan E is mounted upon an extension shaft E which is provided in one end with a socket E adapted to engage the exposedend of the shaft D and to be held in engagement therewith by means of a set screw E There are reg1stering openings from the air chamber E to the fancasing E" which form together the opening X; through which air is driven from the casing E into the air chamdirecting vein extending inwardly from the pelriphery of the chamber E to the axial in et.

F is a second additional air chamber similar to E and F is a second additional fan casing within which is mounted a fan F which is secured upon theshaft E and rotates therewith. Between the casing F and the chamber F is an opening Y similar to the opening X. F is a Vein similar to E.

In theouter wall of the casing F isan opening G within which a spider G is positioned. This spider carries a bearing G within which the outer end of the shaft E is journaled. Across the opening G a screen G is mounted. 1

Each of the fan casings is provided with ears H, H which correspond to the ears 0* of the mainfan casing. Holding rods I extend through all of the ears and in cooperation with the nuts I, I serve to hold the entire assembly together.

In Figure 3 I have shown a bottom view of the fan casings. As shown each of the fan casings and each of the air chambers is provided in its bottom with an enlargement which permits theformation of an air pasv sage to each air chamber. This is indicated form, shape and relation of parts may be made without departing materially from the spirit of my invention and I wish therefore that my showing be taken as in a sense diagrammatic. In particular while I have shown three fans it would be possible to take off the two additional fans and use the blower with one fan, or almost any number of fans might be used so long as a motor of sufiicient strength to carry them is also used.

The use and operation of my invention are as follows: p

The blower is intended primarily for use as a portable blower where it may be carried about readily by hand and used for any blowing purpose. It is often desirable to have a very rapidly moving current of air and for this purpose a sufficient numberof fans will be used to produce the desirable speed of air current. As shown in the figures the air enters the passage moving into one fan where 1t is given a certain velocity.

It moves then directly to the next fan and its velocity is increased and it so moves through the series of fans into the discharge nozzle, and out.

It will be noted that the fan casings and air chambers are all shaped with aligned outwardly projecting extensions shown as E E and F F These extensions provide the air passage between the adjacent units, each unit consisting of a fan casing and an air chamber. The function of each air chamber is to receive the air discharged by the fan and conduct it tothe axis of the succeeding fan. The veins E F, being positioned adjacent the outward extensions or enlargements E F receive the air and guide it directly to the succeeding fan axis.

I claim:

1. In a portable hand blower, a motor, a fan, and a fan casing, and a plurality of removably attachable additional fans, casings therefor, and means for attaching said casings to said first mentioned fan casing, each ofsaid fancasings adapted to deliver the air from the fan within it to the next successive fan and fan casing, said additional fan casings being formed with a fan casing proper and airair chamber, the two being formed of separable parts.

2. In a portable hand blower, a motor, a fan, and a fan casing, and a plurality of removably attachable additional fans, casings therefor, and means for attaching said casings to said first mentioned fan casing,- and an extension shaft adapted to be secured to the shaft of said motor and to carry said additional fans, each of said fan casings adapted todeliver the air from the fan within it to the next successive fan and fan chamber, said additional fan casings being formed with a fan casing proper and an air chamber, the two being formed of separable parts.

3. In a portable hand blower, a motor, and a motor casing thereabout, a handle associated with such casing, a primary fan casing about said fan and permanently associated with said motor casing, an air discharge outlet member associated therewith and an air inlet therefor, a plurality of removably attachable fan casings, an extension shaft adapted to be secured to the motor shaft and a plurality of removably'attachable fansadapted to be positioned on said extension shaft within said additional casings, andmeans for aligning and securing said supplemental casings in relation to said primary casing.

4:. In a portable hand blower, a motor, and a motor casing thereabout, a handle associated with such casing, a primary fan casing about-said fan and permanently associated with said motor casing, an air discharge outlet member associated therewith and an air inlet therefor, a plurality of removably attachable fan casings, an exten-' sion shaft adapted to be secured to the motor shaft and a plurality of removably attachable fans adapted to be positioned on said extension shaft within said additional casings,means for aligning and securing said supplemental casings in relation to said primary casing, comprising apertured lugs upon the primary fan casing, apertured lugs upon said additional casings, securing shafts adapted to pass through said lugs and looking means associated therewith.

5. In a portable hand blower, a motor, and a motor casing thereabout, a handle associated with such casing, a primary fan casing about said fan and permanently associated with said motor casing, an air discharge outlet member associated therewith and an air inlet therefor, a plurality of removably attachable fan casings, an eX- tension shaft adapted to be secured to the motor shaft and a plurality of removably attachable fans adapted to be positioned on- I said extension shaft Within said additional casings, means for aligning and securing said supplemental casings in relation to said primary casing, each of said fan casings being formed to include a fan chamber and an air chamber and a passage member adapted to direct the air from each fan chamber to the succeeding air chamber.

6. In a portable hand blower, a motor, and a motor casing thereabout, a handle associated with such' casing, a primary fan casing about said fan and permanently associated with said motor casing, an air discharge outlet member associated therewith and an air inlet therefor, a plurality of removably attachable fan casings, an extension shaft adapted to be secured to themotor shaft and a plurality of removably attachable fans adapted to be positioned on said extension shaft within said additional casings, means for aligning and securing said siipplen'iental casings in relation to said priinary casing, each of said fan casings being formed to include a fan chamber and an air chamber and a passage member adapted to direct the air from each fan chamber to the succeeding air chamber, and directing means, associated with said air chambers, for directing the a r inwardly toward the center of the siici-reding fan chamber.

Signed at Chicago county of Cook and State of Illinois, this 5th day of March, 

